Update README

README.md

@@ -506,10 +506,11 @@ For faster downloads, install `pip install huggingface_hub[hf_transfer]` and set
 
 ### Using DuckDB (zero download, remote query)
 
-DuckDB can query the Parquet files directly from HuggingFace without downloading anything to disk:
+DuckDB can query the Parquet files directly from HuggingFace without downloading anything to disk. Here are some queries to get you started:
+
+**Find all editions of a specific work.** Let's look up every printing of Roald Dahl's "Fantastic Mr Fox":
 
 ```sql
--- Find all editions of "Fantastic Mr Fox" by Roald Dahl
 SELECT e.key, e.title, e.isbn_13, e.publishers, e.publish_date
 FROM read_parquet('hf://datasets/open-index/open-library/data/editions/*.parquet') e
 WHERE e.work_keys LIKE '%OL45804W%'
@@ -517,17 +518,14 @@ ORDER BY e.publish_date
 LIMIT 20;
 ```
 
-```
-┌──────────────┬─────────────────────┬────────────────────────┬─────────────────┬──────────────┐
-│     key      │        title        │        isbn_13         │   publishers    │ publish_date │
-├──────────────┼─────────────────────┼────────────────────────┼─────────────────┼──────────────┤
-│ /books/OL1M  │ Fantastic Mr Fox    │ ["9780140328721"]      │ ["Puffin"]      │ Oct 1, 1988  │
-│ /books/OL2M  │ Fantastic Mr. Fox   │ ["9780375822063"]      │ ["Knopf"]       │ 2002         │
-└──────────────┴─────────────────────┴────────────────────────┴─────────────────┴──────────────┘
-```
+| key | title | isbn_13 | publishers | publish_date |
+|-----|-------|---------|------------|--------------|
+| /books/OL1M | Fantastic Mr Fox | ["9780140328721"] | ["Puffin"] | Oct 1, 1988 |
+| /books/OL2M | Fantastic Mr. Fox | ["9780375822063"] | ["Knopf"] | 2002 |
+
+**Discover the highest-rated books.** This query finds works with at least 100 ratings, sorted by average score:
 
 ```sql
--- Top-rated works (minimum 100 ratings)
 SELECT work_key,
        ROUND(avg(rating), 2) AS avg_rating,
        count(*)              AS num_ratings
@@ -538,20 +536,17 @@ ORDER BY avg_rating DESC
 LIMIT 5;
 ```
 
-```
-┌─────────────────────┬────────────┬─────────────┐
-│      work_key       │ avg_rating │ num_ratings  │
-├─────────────────────┼────────────┼─────────────┤
-│ /works/OL82563W     │       4.72 │         142 │
-│ /works/OL17860744W  │       4.68 │         109 │
-│ /works/OL5735363W   │       4.65 │         287 │
-│ /works/OL362427W    │       4.63 │         516 │
-│ /works/OL15413843W  │       4.62 │         153 │
-└─────────────────────┴────────────┴─────────────┘
-```
+| work_key | avg_rating | num_ratings |
+|----------|----------:|------------:|
+| /works/OL82563W | 4.72 | 142 |
+| /works/OL17860744W | 4.68 | 109 |
+| /works/OL5735363W | 4.65 | 287 |
+| /works/OL362427W | 4.63 | 516 |
+| /works/OL15413843W | 4.62 | 153 |
+
+**Find the most prolific writers.** Join authors with works to see who has the most entries in the catalog:
 
 ```sql
--- Join authors with their works to find prolific writers
 SELECT a.name,
        count(*) AS num_works
 FROM read_parquet('hf://datasets/open-index/open-library/data/works/*.parquet') w,
@@ -562,38 +557,32 @@ ORDER BY num_works DESC
 LIMIT 5;
 ```
 
-```
-┌───────────────────────────┬───────────┐
-│           name            │ num_works │
-├───────────────────────────┼───────────┤
-│ United States             │     60657 │
-│ Anonymous                 │     33671 │
-│ William Shakespeare       │     11210 │
-│ Various                   │      8435 │
-│ Charles Dickens           │      8206 │
-└───────────────────────────┴───────────┘
-```
+| name | num_works |
+|------|----------:|
+| United States | 60,657 |
+| Anonymous | 33,671 |
+| William Shakespeare | 11,210 |
+| Various | 8,435 |
+| Charles Dickens | 8,206 |
+
+**Explore Wikidata cross-references.** Over 177K authors are linked to Wikidata, making it easy to enrich records with external knowledge:
 
 ```sql
--- Authors with Wikidata links
 SELECT key, name, wikidata_id, birth_date, death_date
 FROM read_parquet('hf://datasets/open-index/open-library/data/authors/*.parquet')
 WHERE wikidata_id IS NOT NULL
 LIMIT 5;
 ```
 
-```
-┌─────────────────────┬─────────────────┬─────────────┬───────────────────────┬───────────────────────┐
-│         key         │      name       │ wikidata_id │      birth_date       │      death_date       │
-├─────────────────────┼─────────────────┼─────────────┼───────────────────────┼───────────────────────┤
-│ /authors/OL34184A   │ Roald Dahl      │ Q25161      │ 13 September 1916     │ 23 November 1990      │
-│ /authors/OL23919A   │ J.K. Rowling    │ Q34660      │ 31 July 1965          │                       │
-│ /authors/OL2162284A │ Stephen King    │ Q39829      │ September 21, 1947    │                       │
-└─────────────────────┴─────────────────┴─────────────┴───────────────────────┴───────────────────────┘
-```
+| key | name | wikidata_id | birth_date | death_date |
+|-----|------|-------------|------------|------------|
+| /authors/OL34184A | Roald Dahl | Q25161 | 13 September 1916 | 23 November 1990 |
+| /authors/OL23919A | J.K. Rowling | Q34660 | 31 July 1965 | |
+| /authors/OL2162284A | Stephen King | Q39829 | September 21, 1947 | |
+
+**See what people want to read.** The reading log captures millions of shelf actions from Open Library users:
 
 ```sql
--- Reading trends: most want-to-read works
 SELECT work_key, count(*) AS readers
 FROM read_parquet('hf://datasets/open-index/open-library/data/reading-log/*.parquet')
 WHERE shelf = 'want-to-read'
@@ -602,17 +591,13 @@ ORDER BY readers DESC
 LIMIT 5;
 ```
 
-```
-┌─────────────────────┬─────────┐
-│      work_key       │ readers │
-├─────────────────────┼─────────┤
-│ /works/OL45804W     │    8432 │
-│ /works/OL82563W     │    7891 │
-│ /works/OL468516W    │    6234 │
-│ /works/OL15413843W  │    5987 │
-│ /works/OL362427W    │    5412 │
-└─────────────────────┴─────────┘
-```
+| work_key | readers |
+|----------|--------:|
+| /works/OL45804W | 8,432 |
+| /works/OL82563W | 7,891 |
+| /works/OL468516W | 6,234 |
+| /works/OL15413843W | 5,987 |
+| /works/OL362427W | 5,412 |
 
 ### Using the raw dumps
 
@@ -842,10 +827,11 @@ Every field is extracted from the source data exactly as provided by OpenLibrary
 
 Most author records are auto-imported stubs from library catalogs (just a name and key), so optional fields like `bio` and `birth_date` appear in a small fraction of records. Editions are the richest config, with strong coverage of ISBNs, publishers, languages, and page counts. Works sit in the middle, with nearly all having author links and about half having subject headings.
 
-You can verify these numbers yourself with a single DuckDB query:
+You can verify these numbers yourself with DuckDB. Here are the queries and results for the three core configs:
+
+**Authors** (15.1M records): most are auto-imported stubs, so rich fields like `bio` are rare, but 1.9M have birth dates and 177K link to Wikidata.
 
 ```sql
--- Field population rates for authors
 SELECT COUNT(*) AS total,
        COUNT(bio) AS has_bio,
        ROUND(COUNT(bio) * 100.0 / COUNT(*), 1) AS bio_pct,
@@ -858,16 +844,13 @@ SELECT COUNT(*) AS total,
 FROM read_parquet('hf://datasets/open-index/open-library/data/authors/*.parquet');
 ```
 
-```
-┌──────────┬─────────┬─────────┬───────────┬───────────┬──────────────┬──────────────┬────────────────┬────────────┐
-│  total   │ has_bio │ bio_pct │ has_birth │ birth_pct │ has_wikidata │ wikidata_pct │ has_remote_ids │ remote_pct │
-├──────────┼─────────┼─────────┼───────────┼───────────┼──────────────┼──────────────┼────────────────┼────────────┤
-│ 15071242 │   43822 │     0.3 │   1935260 │      12.8 │       177233 │          1.2 │         273801 │        1.8 │
-└──────────┴─────────┴─────────┴───────────┴───────────┴──────────────┴──────────────┴────────────────┴────────────┘
-```
+| total | has_bio | bio_pct | has_birth | birth_pct | has_wikidata | wikidata_pct | has_remote_ids | remote_pct |
+|------:|--------:|--------:|----------:|----------:|-------------:|-------------:|---------------:|-----------:|
+| 15,071,242 | 43,822 | 0.3% | 1,935,260 | 12.8% | 177,233 | 1.2% | 273,801 | 1.8% |
+
+**Works** (40.7M records): nearly all have author links and about half have subject headings, making this config great for topic-based exploration.
 
 ```sql
--- Field population rates for works
 SELECT COUNT(*) AS total,
        COUNT(author_keys) AS has_authors,
        ROUND(COUNT(author_keys) * 100.0 / COUNT(*), 1) AS authors_pct,
@@ -880,16 +863,13 @@ SELECT COUNT(*) AS total,
 FROM read_parquet('hf://datasets/open-index/open-library/data/works/*.parquet');
 ```
 
-```
-┌──────────┬─────────────┬─────────────┬──────────────┬──────────────┬──────────┬──────────┬────────────┬────────────┐
-│  total   │ has_authors │ authors_pct │ has_subjects │ subjects_pct │ has_desc │ desc_pct │ has_covers │ covers_pct │
-├──────────┼─────────────┼─────────────┼──────────────┼──────────────┼──────────┼──────────┼────────────┼────────────┤
-│ 40718247 │    38478663 │        94.5 │     20024694 │         49.2 │  1828315 │      4.5 │    9645694 │       23.7 │
-└──────────┴─────────────┴─────────────┴──────────────┴──────────────┴──────────┴──────────┴────────────┴────────────┘
-```
+| total | has_authors | authors_pct | has_subjects | subjects_pct | has_desc | desc_pct | has_covers | covers_pct |
+|------:|------------:|------------:|-------------:|-------------:|---------:|---------:|-----------:|-----------:|
+| 40,718,247 | 38,478,663 | 94.5% | 20,024,694 | 49.2% | 1,828,315 | 4.5% | 9,645,694 | 23.7% |
+
+**Editions** (55.6M records): the richest config by far, with strong coverage of publishers (94.6%), languages (86.6%), and page counts (62.6%). Over half have ISBN-13 numbers.
 
 ```sql
--- Field population rates for editions
 SELECT COUNT(*) AS total,
        COUNT(isbn_13) AS has_isbn13,
        ROUND(COUNT(isbn_13) * 100.0 / COUNT(*), 1) AS isbn13_pct,
@@ -902,13 +882,9 @@ SELECT COUNT(*) AS total,
 FROM read_parquet('hf://datasets/open-index/open-library/data/editions/*.parquet');
 ```
 
-```
-┌──────────┬────────────┬────────────┬──────────┬─────────┬──────────┬──────────┬───────────┬───────────┐
-│  total   │ has_isbn13 │ isbn13_pct │ has_pub  │ pub_pct │ has_lang │ lang_pct │ has_pages │ pages_pct │
-├──────────┼────────────┼────────────┼──────────┼─────────┼──────────┼──────────┼───────────┼───────────┤
-│ 55615769 │   29558726 │       53.1 │ 52626364 │    94.6 │ 48137077 │     86.6 │  34802286 │      62.6 │
-└──────────┴────────────┴────────────┴──────────┴─────────┴──────────┴──────────┴───────────┴───────────┘
-```
+| total | has_isbn13 | isbn13_pct | has_pub | pub_pct | has_lang | lang_pct | has_pages | pages_pct |
+|------:|-----------:|-----------:|--------:|--------:|---------:|---------:|----------:|----------:|
+| 55,615,769 | 29,558,726 | 53.1% | 52,626,364 | 94.6% | 48,137,077 | 86.6% | 34,802,286 | 62.6% |
 
 ## Dataset Creation